玉米横向和竖向通风粮层阻力对比研究  

Comparative study on grain resistance between transverse and vertical ventilation in bulk corn

作　　者：赵会义[1] 尹君[1] 魏雷[1] 曹阳[1] 

机构地区：[1]国家粮食局科学研究院,北京100037

出　　处：《粮油食品科技》2015年第B03期43-46,共4页Science and Technology of Cereals,Oils and Foods

基　　金：国家粮食公益性行业科研专项(201313001-06);十二五国家科技支撑计划项目(2013BAD17B00)

摘　　要：为掌握粮堆在横向通风和竖向通风不同工况下的粮层阻力变化规律和计算方法,以180 t方仓为试验仓,以玉米为试验研究对象。在试验仓中先后设计安装了横向和竖向通风系统,测试并比较分析了不同通风方式玉米粮堆的粮层阻力。研究结果表明:横向通风玉米粮层阻力比竖向通风低1倍左右,揭示出玉米粮堆具有明显的各向异性;首次得到了横向通风粮堆的各项阻力试验公式,并得到了竖向通风粮堆的各项阻力试验公式,发现玉米粮堆的阻力特征完全符合多孔介质的力学规律,既可采用多孔介质的Hunter二项式公式准确计算粮层阻力,也可采用Shedd幂函数公式近似计算粮层阻力。The variation and calculation method of grain resistance under different conditions of transverse and vertical ventilation was researched with the square -bin stored 180t corn as test -bin. The transverse and vertical ventilation equipment was designed and installed in the test -bin respectively. The grain re- sistance was got under different ventilation modes by experiments. The results showed that the unit grain resistance of transverse ventilation was 1 time lower than that of vertical ventilation and the anisotropy in stored corn was significant. The formula of grain resistance under the transverse ventilation was firstly ob- tained by experiments. Likewise, one under the vertical ventilation was also got. The formulas indicated that the character of stored corn resistance was accord with the mechanics laws of porous media. Thus the grain resistance was calculated either accurately by Hunter binomial formula of porous media or approxi- mately by Shedd power function formula.

关 键 词：横向通风 竖向通风 粮层阻力 玉米 

分 类 号：TS205[轻工技术与工程—食品科学]